support unformatted uuid hex string.

adds the abiility to support uuids in the form:
000102030405060708090a0b0c0d0e0f

uuid.go

@@ -100,10 +100,16 @@ func (src *UUID) AssignTo(dst interface{}) error {
 
 // parseUUID converts a string UUID in standard form to a byte array.
 func parseUUID(src string) (dst [16]byte, err error) {
-	if len(src) < 36 {
+	switch len(src) {
+	case 36:
+		src = src[0:8] + src[9:13] + src[14:18] + src[19:23] + src[24:]
+	case 32:
+		// dashes already stripped, assume valid
+	default:
+		// assume invalid.
 		return dst, errors.Errorf("cannot parse UUID %v", src)
 	}
-	src = src[0:8] + src[9:13] + src[14:18] + src[19:23] + src[24:]
+
 	buf, err := hex.DecodeString(src)
 	if err != nil {
 		return dst, err

uuid_test.go

@@ -46,6 +46,10 @@ func TestUUIDSet(t *testing.T) {
 			source: "00010203-0405-0607-0809-0a0b0c0d0e0f",
 			result: pgtype.UUID{Bytes: [16]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}, Status: pgtype.Present},
 		},
+		{
+			source: "000102030405060708090a0b0c0d0e0f",
+			result: pgtype.UUID{Bytes: [16]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}, Status: pgtype.Present},
+		},
 	}
 
 	for i, tt := range successfulTests {